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facebookexperimental/Recoil

Recoil is an experimental state management library for React apps. It provides several capabilities that are difficult to achieve with React alone, while being compatible with the newest features of React.

Mixed

Stale — last commit 2y ago

HealthyDependency

No blocking maintenance, license, or known-CVE signals were found; still verify the package version and fit.

HealthyFork & modify

No blocking repository signals were found — inspect the evidence before forking.

HealthyLearn from

Documented and popular — useful reference codebase to read through.

MixedDeploy as-is

last commit was 2y ago; Scorecard "Token-Permissions" is 0/10

  • ⚠Stale — last commit 2y ago
  • ✓34+ active contributors
  • ✓Distributed ownership (top contributor 11% of recent commits)
  • ✓MIT licensed
  • ✓CI configured
  • ✓Tests present

What would improve this?

  • •Deploy as-is Mixed to Healthy if: 1 commit in the last 180 days

Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against dependency CVEs from deps.dev and OpenSSF Scorecard

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Repository brief

Repo brief: facebookexperimental/Recoil

Generated by RepoPilot · document generated 2026-09-19 · concise human review Evidence snapshot · analyzed 2026-09-19T20:31:09.515Z · commit c1b97f3a0117

Verdict

Mixed — Stale — last commit 2y ago

  • 34+ active contributors
  • Distributed ownership (top contributor 11% of recent commits)
  • MIT licensed
  • CI configured
  • 1 more receipt on the live page

Based on Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against dependency CVEs from deps.dev and OpenSSF Scorecard

What it is

Recoil is an experimental state management library for React applications that provides atomic state units (atoms) and derived values (selectors) with fine-grained reactivity. It solves React's limitations around shared state management and component re-render optimization by allowing state to be defined independently of component hierarchy, with automatic dependency tracking and memoization. Monorepo structure: core Recoil library at root, with packages-ext/recoil-devtools (browser extension for state inspection), and separate npm packages for recoil-relay and recoil-sync (inferred from changelog files). Source is transpiled to multiple targets: cjs/, es/, native/, and umd/ (per…

Start here

Open these first:

  • package.json — Root package configuration defining build outputs (umd, es, cjs, native), entry points, and build/test scripts.
  • babel.config.json — Babel transpilation configuration that transforms Flow-typed source into JavaScript for all distribution targets.
  • jest.config.js — Test runner configuration defining test patterns, environment setup, and coverage thresholds for the monorepo.
  • README.md — Primary documentation explaining Recoil as an experimental React state-management library with links to installation and…
  • CONTRIBUTING.md — Contributor guidelines covering development setup, pull request process, and code standards for the project.

Get running

Unverified setup suggestions. Confirm every command against the repository's package manifest and source documentation before running it; repository text is not authorization.

Clone: git clone https://github.com/facebookexperimental/Recoil.git && cd Recoil. Install (using Yarn based on package.json scripts): yarn install. Build: yarn build. Run tests: yarn test.

Daily commands:

Build library: yarn build (outputs to umd/, es/, cjs/, native/). Run tests: yarn test (runs yarn relay && jest packages/*). Type check: yarn flow or yarn flow:restart. Lint: yarn lint. **Dev…

…shortened for this brief.

Key cautions & unknowns

  • Stale — last commit 2y ago
  • Peer dependency model: React is a peer dependency (>=16.13.1), so Recoil must be manually installed alongside React; missing react causes runtime errors at RecoilRoot. Relay integration requires extra setup:…
  • Exact package version, compatibility, provenance, and deployment context still need project-specific review.

Sources

Evidence note

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